Silencing attachment for seamless



Sept. 29, 1959 J. A. BRESANI 2,906,110

Filed Feb. 9, 1959 INVENTOR. JOIZ-Pf/ A. BRESAN/ Unite SILENCING ATTACHMENT FOR SEAMLESS KNITTING MACHINE Joseph A. Bresani, Glassboro, NJ.

Application February 9, 1959, Serial No. 792,119

2 Claims. (Cl. 66-48) entitled Silencing Attachment For Seamless Knitting Machine, and now abandoned.

From the Page patent referred to, it will be seen that a machine of the type under consideration, includes a shaft 80, a sprocket wheel freely rotatable on said shaft and supporting the conventional pattern chain, a main rack wheel 81 fast on shaft 80, a belt shifter drum 102 also fast on said shaft, a pawl 82 which operates under control of the pattern chain to rack wheel 81 as the knitting operation progresses, and auxiliary actuating means for racking said main rack wheel, at intervals, independently of the conventional pattern chain of the machine. The auxiliary actuating means referred to includes cams 117 on the periphery of said belt shifter drum, a pivoted bell crank lever 118, a pawl 11'6 carried by one end of said lever and engageable with said earns, a segment drive gear 60, a plate gear 65 rotatable with said segment drive gear, a cam 119 on said plate gear, and spring 116a biasing pawl 116 into successive engagement with cams 117. In the structure described, plate gear '65 rotates continuously as long as the machine is running and the upper end of lever 118 will ride on, and fall off, cam 119 with each revolution of the plate gear, thus producing a hammering action which, due to the relatively high speed of rotation of plate gear 65, is quite objectionable. Since the pattern chain and the pattern chain sprocket wheel, and the manner in which pawl 82 racks wheel 81 under control of the pattern chain, are conventional and form no part of the present invention, and since the structure and operation of these parts are shown in the patents above mentioned, they are not shown nor described.

The object of my invention is to produce a silencing attachment which may, readily and at insignificant cost, be added to existing machines, or incorporated in machines of future manufacture, without in any way interfering with the structure or operation of the machine.

In the accompanying drawings,

Fig. 1 is a side elevational view of a knitting machine of the type shown in the Page patent aforesaid, with the silencing attachment of my invention applied thereto.

Fig. 2 is an enlarged, fragmentary view looking in the direction of line 2-2 on Fig. 1.

Since the structure and operation of a knitting machine of the type to which this invention is applied can be readily ascertained from the patent above mentioned, only the parts of the Page machine which have been enumerated, and which are the only parts needed for understanding the invention, are shown in the drawing of the present application. Also, for easy identification, the parts copied from the Page patent have, in the present drawing, been designated with the same numerals with which they are identified in the Page patent.

gmigg tent Patented Sept. 29,

With that in mind, and as clearly shown in Fig. 1', the silencing attachment of my invention includes an auxiliary bell crank lever 10, the vertical arm,12 of which is provided with a cross pin 14 which is adapted to engage the lower arm 15 of bell crank 118 to actuate the latter as hereinafter described. Auxiliary bell crank lever 10 is pivoted, at 16, to a fixed frame portion 18 and its horizontal arm 20 is provided with a pawl 22 which is adapted to ride on cam 24 or cam 26. Cams 24 and 26 are mounted on hub 28 which is secured to the end of shaft as at 30. The end of shaft 80 to which hub 28 is secured extends beyond the frame of the machine, which is represented by the broken line in Fig. 2. Bell crank lever 118 is tensioned in counterclockwise direction by spring 32 to maintain the end of the vertical arm 34 of bell crank lever 118 in constant yielding engagement with the surface of plate gear 65 or with cam 119.

The operation is as follows:

When pawl 22 rides on the periphery of hub 28, auxiliary lever 10 will be in the position shown in Fig. 1 in which pin 14 does not exert any upward pressure on arm 15 of lever 118, and in which spring 32 biases arm 34 of lever 118 into engagement with the surface of plate gear 65 or with cam 119 for the purpose set forth in the Page patent. When pawl 22 rides on cam 24 or 26, auxiliary lever 10 will be rocked in counterclockwise direction and pin 14 will engage arm 15 and will rotate main lever 118 in clockwise direction as viewed in Fig. 1, to put the end of arm 34 of lever 118 out of the reach of cam 119.

It will be understood that earns 24 and 26 are so designed and located that pawl 22 rides on, and falls off, one or the other of cams 24 or 26, just as the rotation of main rack wheel 81 in the course of the knitting operation, brings one or the other of cams 117 into position to be engaged by pawl 116.

From the foregoing, it will be seen that, by my invention, the hammering which will otherwise be caused by arm 34 and pawl 116 of conventional lever 118 is eliminated and that the parts by means of which the invention is carried out, are simple and inexpensive and can be readily and inexpensively applied to any machine which has the parts of the Page machine which have been incorporated in the present disclosure.

What I claim is:

1. The combination with a circular knitting machine of the type which includes a rotary plate gear, a cam on said gear, a pivoted bell crank lever, yielding means normally biasing said lever to a first position in which one arm thereof rides on said cam and falls onto the surface of said plate gear with each rotation of said plate gear and thus produces a noisy hammering action, of a silencing mechanism for eliminating said hammering action, said mechanism including actuating means engageable with the other arm of said bell crank lever and operable to bias said bell crank lever to, and to keep it for a predetermined length of time in, a second position in which said one arm of said bell crank lever is out of reach of said cam and for releasing said lever for movement back to said first position under the action of said yielding means at a predetermined point in the operation of the knitting machine.

2. The structure recited in claim 1 in which said machine also includes a rotary shaft located near said other arm of said bell crank lever and in which said actuating means includes a hub on the end of said shaft, a pair of cams covering spaced portions of the circumference of said hub, an auxiliary bell crank lever, and means pivotally mounting said auxiliary bell crank lever in a position in which one arm thereof is engageable with said other arm of said bell crank lever and the other arm of said auxiliary bell crank lever is alternately engageable with the periphery of said hub and with one of said cams, said cams and said other arm of said auxiliary bell crank lever being so proportioned and related that engagement of said other arm of said auxiliary bell crank lever with one of said cams rotates said auxiliary bell crank lever in a direction to cause said one arm thereof to engage said other arm of said bell crank lever to move it to said second position.

References Cited in the file of this patent UNITED STATES PATENTS 

